package com.ruixin.common.utils;

import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.List;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.lang3.StringEscapeUtils;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.LocaleResolver;

import com.google.common.collect.Lists;

public class StringUtils  extends org.apache.commons.lang3.StringUtils {
	  private static final char SEPARATOR = '_';
	    private static final String CHARSET_NAME = "UTF-8";
	    
	    /**
	     * 转换为字节数组
	     * @param str
	     * @return
	     */
	    public static byte[] getBytes(String str){
	    	if (str != null){
	    		try {
					return str.getBytes(CHARSET_NAME);
				} catch (UnsupportedEncodingException e) {
					return null;
				}
	    	}else{
	    		return null;
	    	}
	    }
	    
	    /**
	     * 转换为字节数组
	     */
	    public static String toString(byte[] bytes){
	    	try {
				return new String(bytes, CHARSET_NAME);
			} catch (UnsupportedEncodingException e) {
				return EMPTY;
			}
	    }
	    
	    /**
	     * 是否包含字符串
	     * @param str 验证字符串
	     * @param strs 字符串组
	     * @return 包含返回true
	     */
	    public static boolean inString(String str, String... strs){
	    	if (str != null){
	        	for (String s : strs){
	        		if (str.equals(trim(s))){
	        			return true;
	        		}
	        	}
	    	}
	    	return false;
	    }
	    
		/**
		 * 替换掉HTML标签方法
		 */
		public static String replaceHtml(String html) {
			if (isBlank(html)){
				return "";
			}
			String regEx = "<.+?>";
			Pattern p = Pattern.compile(regEx);
			Matcher m = p.matcher(html);
			String s = m.replaceAll("");
			return s;
		}
		
		/**
		 * 替换为手机识别的HTML，去掉样式及属性，保留回车。
		 * @param html
		 * @return
		 */
		public static String replaceMobileHtml(String html){
			if (html == null){
				return "";
			}
			return html.replaceAll("<([a-z]+?)\\s+?.*?>", "<$1>");
		}
		
		/**
		 * 替换为手机识别的HTML，去掉样式及属性，保留回车。
		 * @param txt
		 * @return
		 */
	/*	public static String toHtml(String txt){
			if (txt == null){
				return "";
			}
			return replace(replace(Encodes.escapeHtml(txt), "\n", "<br/>"), "\t", "&nbsp; &nbsp; ");
		}*/

		/**
		 * 缩略字符串（不区分中英文字符）
		 * @param str 目标字符串
		 * @param length 截取长度
		 * @return
		 */
		public static String abbr(String str, int length) {
			if (str == null) {
				return "";
			}
			try {
				StringBuilder sb = new StringBuilder();
				int currentLength = 0;
				for (char c : replaceHtml(StringEscapeUtils.unescapeHtml4(str)).toCharArray()) {
					currentLength += String.valueOf(c).getBytes("GBK").length;
					if (currentLength <= length - 3) {
						sb.append(c);
					} else {
						sb.append("...");
						break;
					}
				}
				return sb.toString();
			} catch (UnsupportedEncodingException e) {
				e.printStackTrace();
			}
			return "";
		}
		
		public static String abbr2(String param, int length) {
			if (param == null) {
				return "";
			}
			StringBuffer result = new StringBuffer();
			int n = 0;
			char temp;
			boolean isCode = false; // 是不是HTML代码
			boolean isHTML = false; // 是不是HTML特殊字符,如&nbsp;
			for (int i = 0; i < param.length(); i++) {
				temp = param.charAt(i);
				if (temp == '<') {
					isCode = true;
				} else if (temp == '&') {
					isHTML = true;
				} else if (temp == '>' && isCode) {
					n = n - 1;
					isCode = false;
				} else if (temp == ';' && isHTML) {
					isHTML = false;
				}
				try {
					if (!isCode && !isHTML) {
						n += String.valueOf(temp).getBytes("GBK").length;
					}
				} catch (UnsupportedEncodingException e) {
					e.printStackTrace();
				}

				if (n <= length - 3) {
					result.append(temp);
				} else {
					result.append("...");
					break;
				}
			}
			// 取出截取字符串中的HTML标记
			String temp_result = result.toString().replaceAll("(>)[^<>]*(<?)",
					"$1$2");
			// 去掉不需要结素标记的HTML标记
			temp_result = temp_result
					.replaceAll(
							"</?(AREA|BASE|BASEFONT|BODY|BR|COL|COLGROUP|DD|DT|FRAME|HEAD|HR|HTML|IMG|INPUT|ISINDEX|LI|LINK|META|OPTION|P|PARAM|TBODY|TD|TFOOT|TH|THEAD|TR|area|base|basefont|body|br|col|colgroup|dd|dt|frame|head|hr|html|img|input|isindex|li|link|meta|option|p|param|tbody|td|tfoot|th|thead|tr)[^<>]*/?>",
							"");
			// 去掉成对的HTML标记
			temp_result = temp_result.replaceAll("<([a-zA-Z]+)[^<>]*>(.*?)</\\1>",
					"$2");
			// 用正则表达式取出标记
			Pattern p = Pattern.compile("<([a-zA-Z]+)[^<>]*>");
			Matcher m = p.matcher(temp_result);
			List<String> endHTML = Lists.newArrayList();
			while (m.find()) {
				endHTML.add(m.group(1));
			}
			// 补全不成对的HTML标记
			for (int i = endHTML.size() - 1; i >= 0; i--) {
				result.append("</");
				result.append(endHTML.get(i));
				result.append(">");
			}
			return result.toString();
		}
		
		/**
		 * 转换为Double类型
		 */
		public static Double toDouble(Object val){
			if (val == null){
				return 0D;
			}
			try {
				return Double.valueOf(trim(val.toString()));
			} catch (Exception e) {
				return 0D;
			}
		}

		/**
		 * 转换为Float类型
		 */
		public static Float toFloat(Object val){
			return toDouble(val).floatValue();
		}

		/**
		 * 转换为Long类型
		 */
		public static Long toLong(Object val){
			return toDouble(val).longValue();
		}

		/**
		 * 转换为Integer类型
		 */
		public static Integer toInteger(Object val){
			return toLong(val).intValue();
		}
		
		/**
		 * 获得i18n字符串
		 */
		public static String getMessage(String code, Object[] args) {
			LocaleResolver localLocaleResolver = (LocaleResolver) SpringContextHolder.getBean(LocaleResolver.class);
			HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();  
			Locale localLocale = localLocaleResolver.resolveLocale(request);
			return SpringContextHolder.getApplicationContext().getMessage(code, args, localLocale);
		}
		
		/**
		 * 获得用户远程地址
		 */
		public static String getRemoteAddr(HttpServletRequest request){
			String remoteAddr = request.getHeader("X-Real-IP");
	        if (isNotBlank(remoteAddr)) {
	        	remoteAddr = request.getHeader("X-Forwarded-For");
	        }else if (isNotBlank(remoteAddr)) {
	        	remoteAddr = request.getHeader("Proxy-Client-IP");
	        }else if (isNotBlank(remoteAddr)) {
	        	remoteAddr = request.getHeader("WL-Proxy-Client-IP");
	        }
	        return remoteAddr != null ? remoteAddr : request.getRemoteAddr();
		}

		/**
		 * 驼峰命名法工具
		 * @return
		 * 		toCamelCase("hello_world") == "helloWorld" 
		 * 		toCapitalizeCamelCase("hello_world") == "HelloWorld"
		 * 		toUnderScoreCase("helloWorld") = "hello_world"
		 */
	    public static String toCamelCase(String s) {
	        if (s == null) {
	            return null;
	        }

	        s = s.toLowerCase();

	        StringBuilder sb = new StringBuilder(s.length());
	        boolean upperCase = false;
	        for (int i = 0; i < s.length(); i++) {
	            char c = s.charAt(i);

	            if (c == SEPARATOR) {
	                upperCase = true;
	            } else if (upperCase) {
	                sb.append(Character.toUpperCase(c));
	                upperCase = false;
	            } else {
	                sb.append(c);
	            }
	        }

	        return sb.toString();
	    }

	    /**
		 * 驼峰命名法工具
		 * @return
		 * 		toCamelCase("hello_world") == "helloWorld" 
		 * 		toCapitalizeCamelCase("hello_world") == "HelloWorld"
		 * 		toUnderScoreCase("helloWorld") = "hello_world"
		 */
	    public static String toCapitalizeCamelCase(String s) {
	        if (s == null) {
	            return null;
	        }
	        s = toCamelCase(s);
	        return s.substring(0, 1).toUpperCase() + s.substring(1);
	    }
	    
	    /**
		 * 驼峰命名法工具
		 * @return
		 * 		toCamelCase("hello_world") == "helloWorld" 
		 * 		toCapitalizeCamelCase("hello_world") == "HelloWorld"
		 * 		toUnderScoreCase("helloWorld") = "hello_world"
		 */
	    public static String toUnderScoreCase(String s) {
	        if (s == null) {
	            return null;
	        }

	        StringBuilder sb = new StringBuilder();
	        boolean upperCase = false;
	        for (int i = 0; i < s.length(); i++) {
	            char c = s.charAt(i);

	            boolean nextUpperCase = true;

	            if (i < (s.length() - 1)) {
	                nextUpperCase = Character.isUpperCase(s.charAt(i + 1));
	            }

	            if ((i > 0) && Character.isUpperCase(c)) {
	                if (!upperCase || !nextUpperCase) {
	                    sb.append(SEPARATOR);
	                }
	                upperCase = true;
	            } else {
	                upperCase = false;
	            }

	            sb.append(Character.toLowerCase(c));
	        }

	        return sb.toString();
	    }
	    
	    /**
	     * 获取工程路径
	     * @return
	     */
	    public static String getProjectPath(){
			String projectPath = "";
			try {
				File file = new DefaultResourceLoader().getResource("").getFile();
				if (file != null){
					while(true){
						File f = new File(file.getPath() + File.separator + "src" + File.separator + "main");
						if (f == null || f.exists()){
							break;
						}
						if (file.getParentFile() != null){
							file = file.getParentFile();
						}else{
							break;
						}
					}
					projectPath = file.toString();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
			return projectPath;
	    }
	    
	    /**
	     * 如果不为空，则设置值
	     * @param target
	     * @param source
	     */
	    public static void setValueIfNotBlank(String target, String source) {
			if (isNotBlank(source)){
				target = source;
			}
		}
	 
	    /**
	     * 转换为JS获取对象值，生成三目运算返回结果
	     * @param objectString 对象串
	     *   例如：row.user.id
	     *   返回：!row?'':!row.user?'':!row.user.id?'':row.user.id
	     */
	    public static String jsGetVal(String objectString){
	    	StringBuilder result = new StringBuilder();
	    	StringBuilder val = new StringBuilder();
	    	String[] vals = split(objectString, ".");
	    	for (int i=0; i<vals.length; i++){
	    		val.append("." + vals[i]);
	    		result.append("!"+(val.substring(1))+"?'':");
	    	}
	    	result.append(val.substring(1));
	    	return result.toString();
	    }
	    
	
}
